title: Development of a cryogenic load frame for the neutron diffractometer at Takumi in Japan Proton Accelerator Research Complex.
abstract: To prepare for projects such as the Large Hadron Collider upgrade, International Thermonuclear Experimental Reactor and Demonstration reactor, it is important to form a clear understanding of stress-strain properties of the materials that make up superconducting magnets. Thus, we have been studying the mechanical properties of superconducting wires using neutron diffraction measurements. To simulate operational conditions such as temperature, stress, and strain, we developed a cryogenic load frame for stress-strain measurements of materials using a neutron diffractometer at Japan Proton Accelerator Research Complex (J-PARC) Takumi beam line. The maximum load that can be applied to a sample using an external driving machine is 50 kN. Using a Gifford-MacMahon cryocooler, samples can be measured down to temperatures below 10 K when loaded. In the present paper, we describe the details of the cryogenic load frame with its test results by using type-304 stainless steel wire.
authors.affiliation: High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan. shinte@post.kek.jp
authors.forename: Xinzhe
authors.initials: X
authors.lastname: Jin
authors.forename: Tatsushi
authors.initials: T
authors.lastname: Nakamoto
authors.forename: Stefanus
authors.initials: S
authors.lastname: Harjo
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Hemmi
authors.forename: Takahiro
authors.initials: T
authors.lastname: Umeno
authors.forename: Toru
authors.initials: T
authors.lastname: Ogitsu
authors.forename: Akira
authors.initials: A
authors.lastname: Yamamoto
authors.forename: Michinaka
authors.initials: M
authors.lastname: Sugano
authors.forename: Kazuya
authors.initials: K
authors.lastname: Aizawa
authors.forename: Jun
authors.initials: J
authors.lastname: Abe
authors.forename: Wu
authors.initials: W
authors.lastname: Gong
authors.forename: Takaaki
authors.initials: T
authors.lastname: Iwahashi